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uniq(1)				 User Commands			       uniq(1)

NAME
       uniq - report or	filter out repeated lines in a file

SYNOPSIS
       uniq [-c	| -d | -u]  [-f	fields]	[-s char] [ input_file [output_file]]

       uniq [-c	| -d | -u]  [-n] [ + m]	[ input_file  [output_file]]

DESCRIPTION
       The  uniq utility will read an input file comparing adjacent lines, and
       write one copy of each input line on the	output.	The  second  and  suc-
       ceeding copies of repeated adjacent input lines will not	be written.

       Repeated	 lines in the input will not be	detected if they are not adja-
       cent.

OPTIONS
       The following options are supported:

       -c	       Precedes	each output line with a	count of the number of
		       times the line occurred in the input.

       -d	       Suppresses  the	writing	of lines that are not repeated
		       in the input.

       -f fields       Ignores the first fields	fields on each input line when
		       doing  comparisons,  where fields is a positive decimal
		       integer.	A field	is the maximal string matched  by  the
		       basic regular expression:

		       [[:blank:]]*[^[:blank:]]*

		       If fields specifies more	fields than appear on an input
		       line, a null string will	be used	for comparison.

       -s chars	       Ignores the first chars characters when	doing  compar-
		       isons,  where  chars  is	a positive decimal integer. If
		       specified in conjunction	with the -f option, the	 first
		       chars  characters after the first fields	fields will be
		       ignored.	If chars specifies more	characters than	remain
		       on  an  input line, a null string will be used for com-
		       parison.

       -u	       Suppresses the writing of lines that  are  repeated  in
		       the input.

       -n	       Equivalent to -f	fields with fields set to n.

       +m	       Equivalent to -s	chars with chars set to	m.

OPERANDS
       The following operands are supported:

       input_file      A  path	name  of  the input file. If input_file	is not
		       specified, or if	the  input_file	 is  -,	 the  standard
		       input will be used.

       output_file     A  path	name of	the output file. If output_file	is not
		       specified,  the	standard  output  will	be  used.  The
		       results	are  unspecified  if  the  file	 named by out-
		       put_file	is the file named by input_file.

EXAMPLES
       Example 1: Using	the uniq command

       The following example lists the contents	of the uniq.test file and out-
       puts a copy of the repeated lines.

       example%	cat uniq.test
       This is a test.
       This is a test.
       TEST.
       Computer.
       TEST.
       TEST.
       Software.

       example%	uniq -d	uniq.test
       This is a test.
       TEST.
       example%

       The  next example outputs just those lines that are not repeated	in the
       uniq.test file.

       example%	uniq -u	uniq.test
       TEST.
       Computer.
       Software.
       example%

       The last	example	outputs	a report with each line	preceded by a count of
       the number of times each	line occurred in the file:

       example%	uniq -c	uniq.test
	  2 This is a test.
	  1 TEST.
	  1 Computer.
	  2 TEST.
	  1 Software.
       example%

ENVIRONMENT VARIABLES
       See  environ(5) for descriptions	of the following environment variables
       that affect the execution of uniq: LANG,	LC_ALL,	LC_CTYPE, LC_MESSAGES,
       and NLSPATH.

EXIT STATUS
       The following exit values are returned:

       0	Successful completion.

       >0	An error occurred.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE	TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       comm(1),	pack(1), pcat(1), sort(1), uncompress(1), attributes(5), envi-
       ron(5), standards(5)

SunOS 5.10			  20 Dec 1996			       uniq(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | OPERANDS | EXAMPLES | ENVIRONMENT VARIABLES | EXIT STATUS | ATTRIBUTES | SEE ALSO

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